Manifolds with group actions and elliptic operators
V. Ya. Lin, Yehuda Pinchover · Memoirs of the American Mathematical Society · 1994
Introduction Some notions connected with group actions Some notions and results connected with elliptic operators Elliptic operators and group actions Positive multiplicative solutions Nilpotent groups: extreme points and multiplicative solutions Nonnegative solutions of parabolic equations Invariant operators on a manifold with boundary Examples and open problems Appendix: analyticity of $\Lambda (\xi, \scr L)$ References.